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分解因式m^4-4m^2n^2+n^4
人气:169 ℃ 时间:2020-04-29 02:27:03
解答
m^4-4m^2n^2+n^4
=m^2(m^2-4n^2+n^4)
=m^2(m-2n^2)^2
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